package com.atguigu.mall.auth.controller;

import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.constant.AuthServerConstant;
import com.atguigu.common.exception.BizCodeEnume;
import com.atguigu.common.utils.R;
import com.atguigu.common.vo.MemberRespVo;
import com.atguigu.mall.auth.feign.MemberFeignService;
import com.atguigu.mall.auth.feign.ThirdPartyFeignService;
import com.atguigu.mall.auth.vo.UserLoginVo;
import com.atguigu.mall.auth.vo.UserRegistVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.util.StringUtils;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * @author zststart
 * @create 2022-06-11 14:01
 */
@Controller
public class LoginController {
    //发送一个请求，跳转到一个页面  用视图映射，WebMvcConfiger
//    @GetMapping("/login.html")
//    public String loginPage(){
//        return "login";
//    }
//    @GetMapping("/reg.html")
//    public String regPage(){
//        return "reg";
//    }
    @Autowired
    ThirdPartyFeignService thirdPartyFeignService;
    @Autowired
    StringRedisTemplate stringRedisTemplate;
    @Autowired
    MemberFeignService memberFeignService;
    @ResponseBody
    @GetMapping("/sms/sendcode")
    public R sendCode(@RequestParam("phone") String phone){
        //TODO:接口防刷
        String redisCode = stringRedisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if(!StringUtils.isEmpty(redisCode)){
            long l = Long.parseLong(redisCode.split("_")[1]);
            if(System.currentTimeMillis()-l<60000){
                //60s内不能再发
                return R.error(BizCodeEnume.SMS_CODE_EXCEPTION.getCode(), BizCodeEnume.SMS_CODE_EXCEPTION.getMsg());
            }
        }
        //验证码的再次校验：存在redis中
        String code = UUID.randomUUID().toString().substring(0, 5);
        String substring = code+"_"+System.currentTimeMillis();
        stringRedisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX+phone,code,10, TimeUnit.MINUTES);//10分钟有效

        thirdPartyFeignService.sendCode(phone,code);
        return R.ok();
    }
    @PostMapping("/regist")
    public String regist(@Valid UserRegistVo vo, BindingResult result, RedirectAttributes redirectAttributes){
        if(result.hasErrors()){
            Map<String, String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(fieldError -> {
                return fieldError.getField();
            }, fieldError -> {
                return fieldError.getDefaultMessage();
            }));
//            model.addAttribute("errors",errors);
            redirectAttributes.addFlashAttribute("errors",errors);
            //校验出错，重定向携带数据，利用session原理，将数据放在session中，只要跳到下一个页面取出这个数据后，session里面的数据就会删掉
            //TODO: 分布式下的session问题
            return "redirect:http://auth.mall.com/reg.html";
        }

        //校验验证码
        String code = vo.getCode();
        String s = stringRedisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if(!StringUtils.isEmpty(s)){
            if(code.equals(s.split("_")[0])){
                //删除验证码,令牌机制
                stringRedisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
                //验证码通过， 真正注册，调用远程服务进行注册
                R r = memberFeignService.regist(vo);
                if(r.getCode()==0){
                    //成功
                    return "redirect:http://auth.mall.com/login.html";
                }else {
                    Map<String, String> errors = new HashMap<>();
                    errors.put("msg",r.getData("msg",new TypeReference<String>(){}));
                    redirectAttributes.addFlashAttribute("errors",errors);
                    return "redirect:http://auth.mall.com/reg.html";
                }

            }else {
                Map<String, String> errors = new HashMap<>();
                errors.put("code","验证码错误");
                redirectAttributes.addFlashAttribute("errors",errors);
                //校验码出错
                return "redirect:http://auth.mall.com/reg.html";
            }
        }else {
            Map<String, String> errors = new HashMap<>();
            errors.put("code","验证码错误");
            redirectAttributes.addFlashAttribute("errors",errors);
            //校验码出错
            return "redirect:http://auth.mall.com/reg.html";
        }
    }
    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes redirectAttributes, HttpSession session){
        //远程登陆
        R r = memberFeignService.login(vo);
        if(r.getCode()==0){
            MemberRespVo data = r.getData("data", new TypeReference<MemberRespVo>() {
            });
            //成功放到session中
            session.setAttribute(AuthServerConstant.LOGIN_USER,data);
            return "redirect:http://mall.com";
        }else {
            //失败
            Map<String, String> errors = new HashMap<>();
            errors.put("msg",r.getData("msg",new TypeReference<String>(){}));
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.mall.com/login.html";
        }

    }
    @GetMapping("/login.html")
    public String loginPage(HttpSession session){
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        if(attribute==null){
            return "login";
        }else {
            return "redirect:http://mall.com";
        }
    }
}
